88344domain: NAppears in sequencesFP2 polynomials related to the generating functions of the left hand columns of the A156920 triangle.at n=23A156925a(n) is the smallest integer > a(n-1) such that a(n) shares no digit with a(n-1) and c=a(n-1)+a(n), and also a(n-1) shares no digit with c.at n=28A166461